Polymer electrolyte membranes (pems) based on imidazole ring terminated flexible branches grafted on hybrid inorganic-organic polymers
First Claim
1. A proton conductive membrane, comprising a material formed from copolymerization of at least a first silane and a second silane, the first silane comprising a first silane group, a terminal group, and a linking group connecting the terminal group to the first silane group, the first terminal group including at least one atom providing a lone pair of electrons.
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Abstract
A composition of matter comprises a polymer network, including silicon atoms and oxygen atoms, a first organic side-chain attached to at least some silicon atoms within the polymer network comprising a flexible linking group and a terminal group, the terminal group including at least one atom providing a lone pair of electrons. The composition of matter can be used to form a proton-conducting membrane. In illustrative examples, the polymer network can be an organic-inorganic hybrid network and the terminal group can includes a nitrogen-containing heterocycle.
12 Citations
46 Claims
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1. A proton conductive membrane, comprising a material formed from copolymerization of at least a first silane and a second silane,
the first silane comprising a first silane group, a terminal group, and a linking group connecting the terminal group to the first silane group, the first terminal group including at least one atom providing a lone pair of electrons.
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2. The proton conductive membrane of claim A1, wherein the first silane group is an alkyloxysilyl group of the form
— - Si(OR1)(OR2)(OR3), where R1, R2, and R3 each represent an alkyl group or a hydrogen atom.
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18. A composition of matter, comprising
a polymer network, including silicon atoms and oxygen atoms; -
a first organic side-chain attached to at least some silicon atoms within the polymer network, the first organic side-chain comprising a linking group and a terminal group, the linking group connecting the terminal group to a silicon atom of the polymer network, the terminal group including at least one atom providing a lone pair of electrons. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A fuel cell including a positive electrode, a negative electrode, and the proton electrolyte membrane of claim 29.
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30. A method of synthesizing a silane precursor, the method comprising:
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providing a first compound, including a terminal group and a first reactive group;
providing a second compound, including a silane group and a second reactive group;
providing a reaction between the first reactive group and the second reactive group so as to provide the silane precursor, the silane precursor having the terminal group connected to the silane group through a linking group, the silane precursor being polymerizable in a sol-gel process to form an organic-inorganic hybrid network. - View Dependent Claims (31, 32, 33, 34, 35)
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36. A silane precursor, the silane precursor comprising:
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a silane group, a linking group, connected to the silane group, and a terminal group, attached to the linking group, the terminal group including at least one atom providing a lone pair of electrons, the atoms chosen from the group consisting of nitrogen, sulfur, and oxygen. - View Dependent Claims (37, 38, 39)
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40. A proton conductive membrane, formed from the copolymerization of at least a first precursor and a second precursor,
the first precursor including: -
a first polymerizable group, a linking group, and a terminal group, the terminal group being connected to the first reactive group through the linking group, the terminal group including at least one atom providing a lone pair of electrons; and
the second precursor having a second polymerizable group. - View Dependent Claims (41, 42, 43, 44, 45)
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46. A composition of matter, comprising:
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an inorganic-organic hybrid network;
nitrogen-containing heterocycles flexibly attached to the inorganic-organic hybrid network; and
acid groups bound to the inorganic-organic hybrid network.
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Specification